The invention relates to an antiseptic measure for an expansion type oblique plug fixed in a blind hole. The oblique plug is preferable of impact expansion type, which can be inserted in a drilling hole with a bottom expanded section. The oblique plug is provided with a pole bolt on the bottom of the drilling hole, and the end of the bolt is provided with an extended taper and an expansion type bushing which can be slipped to the extended taper. In order to prevent part of the expansion type oblique plug which is arranged in the drilling hole and a steel bar exposed from corrosion, sealing liquid is filled in the drilling hole before the oblique plug is arranged. The sealing liquid is extruded to the bottom of the drilling hole from bottom of the expansion type oblique plug. The sealing liquid flows upward along the oblique plug till excessive part overflows out of the drilling hole. |